Answer:
5r + 3s ≥ 30
Step-by-step explanation:
We know Keiko wants to do exercise at least 30 minutes a day, and she wants ideally to mix up the activities, by combining running and swimming into her schedule.
Since each lap she runs takes 5 minutes and each lap she swims takes 3 minutes, these will be the left side of the inequality:
5r + 3s
She wants to exercise at least 30 minutes a day, so...
5r + 3s ≥ 30
she could do 3 laps of running and 5 laps of swimming for example.
The answer is 60 degrees angle
8 is b because a circle is 360.
I've attached a photo of the solution below. Hope it helps!
(3x+4) units.
Working;
AM=AD+DM
=x+5+2x-1
=(3x+4) units
